Tiles

Tiles are sets of 256 squares of pixel art textures that can be used to theme maps and levels.
Each tile is 64 pixels by 64 pixels. A tileset is 16 by 16 tiles, totaling 1024 pixels by 1024 pixels.

Tilesets can be exported to Miiverse™ or to the SDK Spriter online gallery.
Tilesets exported to Miiverse publicly display at about 40% resolution.
Tilesets exported to the online gallery publicly display at 25% resolution, and the original artist can claim the art at its full resolution.

Palettes

5 color palettes are available for drawing sprites: 2 based on classic video game consoles, 1 based on a classic video game handheld, 1 grayscale one, and the hue one from SDK Paint.
These palettes can be swapped at any time.
Additionally, use the dropper tools to select previously-used colors from the canvas.
This may include colors not on the current palette.